lol.... with nero your buster moves gets better and for dante his skills with his devil arms like Stinger, kick13, pin up. and with his guns they don't need charge up. he takes Pandoras ask up faster, he is stronger, don't take the same damage. more for nero like Showdown (love to use it sometimes) and he uses summoned swords. as you can see the devil trigger makes them stronger better and also faster (not in running).